Bolster.



J. M. ROHLFING.

BOLSTBR. APPLICATION FILED MAIL-7, 1911.

1,052,754, Patent-,ed Feb.11, 1913.

lwrrNEssEs ATTORNEY UNITED STATES i PATENT oEEioE.

- JOHN M. noHLEINe, or s'r.,LoUIs, MrssoUEL-ASSIGNOR To AMERICAN CAR-AND FOUNDEY COMPANY, or sT. LoUIs, MISSOURI, A CORPORATION oF NEW JERSEY,-`

BoLs'rER.

Specification of Letters ateiit.

' Patented Feb. 11,1;'5'1 a.

Application med March 7, 1911*. serial No. 612,857.

To all whom it may concern.'

citizen of the United States, have inventedV certain new and useful Improvements in Bolsters, ofwhich the following is a full, clear, and exact description, such as will enable others skilled in the art towhich it appertains-to make and to use the same, reference being had to the accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof will occur to persons skilled in the art. v

In said drawings: Figure 1 ifs a side view of the cast bolster forming the subject matter of this application. Fig. 2 is a plan view of the bolster.V Fig. 3 is a sectional View, the section being taken on line 3-3 of Fig. 2,'the vertical, radial flanges being seen in elevation. Fig. 4 is a sectional view, the section being taken on line 4-4 of Fig. 2.

The object of the present invention is to produce an integralfcast bolster comprising a platform or grid including center bearing with sill supporting arms radiating therefrom in such manner as to best support the longitudinal car sills.

The invention comprises certain features of novelty all as hereinafter more fully described and specifically pointed out in the claims.

Referring to the parts, 5 is the platform web or top flange of the bolster, 6 is the bottom flange thereof and 7 is the center pin socket. Radiatng from the center bearing 8 are arms 9, 10,'11, 12and 13, each of which is provided with a vertical web. Intersecting the arms 10-11-12-13 and extending across the ends of t-lie arms 9 is a curvilinear connector 14 provided with a flange 17 which, with the said arms, forms a grid provided with .the top and bottom flanges 5-6 and the center bearing before referred to. The laterally extending arms 10-11 extend beyond the connector 14, as shown in Fig. 2, and terminate in end por! tions provided with vertical flanges 15 which serve to connect the web flanges 5-6. The arms 10H11 extend at right angles to the arms 9 and extending at acute angles thereto the arms 12-13 extend beyond the lriecl by the said cantaliver arms.

their end port-ions in alinement longitudinally of the car with the end portionssof the V'arins-1011',`as best shown in the plan View -F1g. 2, all of said arms 10 tov13 inclusive being provided with the end flanges 15 and the arms 12-13 being provided with vertically extending flanges 16 transversely of the car.

From an inspection of the drawings, the utility of the device described herein is easily perceived. The arms 10, 11, 12 and 13 and the curvilinear portion of the connector 14 between the arms 10, 11, 12 and 13 will bear approximately two-thirds of the torsional strain and the weight carried by the cantaliver arms 12 and 13, and consequently the curvilinear portion of the connector 14 between the arm 9 and the cantaliver arms` 12 and 13 will bear one-third of the torsional ,strains and the weight car- As the periphery of the curvilinear connector at the point where the arm 9 meets said periphery extends to the same lateral-plane transverse of the car as the extremities of the cantaliver arms 12 and 13, or to the plane of the flange 16 it forms a novel means for supporting a portion of the Weight and torsional strains intermediate of the` extremities of the cantaliver arms 12 and 13, thearm 9 forming a rigid support for this portion of the curvilinear connector. Furthermore, this function could not be accomplished were the arm 9 and the curvilinear portion of the connector 14 omitted from the construction.

What I claim is:

1. A car bolster comprising as an integer, a centrally supported circular trussed frame and a plurality of cantaliver supports for tlie side sills extending diametrically therethrough, and alined longitudinally of the bolster at their outer extremities, the said circular frame being adapted to carry a part of the load and torsional strains between the said cantaliver arms.

2. A car bolster comprising as an integer, a centrally supported circular tiussed frame, a plurality of side sill supports comprising diametric cantalii'er truss aiins,rone extending through the lateral diameter of said circular frame and two diagonal to the first and equi-angularly arranged tlici'eto and conforming to a diameter of the said circu- `connector 14,.forming cantaliver. arinswith l" lmj f ram `2511 ofsaid" cantalvr :irma having adapted lgocar'y a 'part of the load and tof! their outer extrmities alined -i'i}"'the sa,me` sional gtrainso'f `said diagonal oagntadvel"v I la'teral plane transwrsely of the vom: and `H. DoUGLos.

o washington, n. c." 1 

